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A questionnaire has little to do with sampling technique. Sampling technique is to do with who gets the questionnaire and that can be any sampling technique: the questionnaire can be sent to everyone (census), to a random sample, stratified random samples, to random samples in clusters, by quota or convenience. Or a pile of questionnaires can be left for respondents to pick up - self-selection.
Saliva sample testing is a technique used to collect samples of a person's saliva, or spit, to check for or monitor certain drugs, hormones (chemical messengers from one cell or group of cells to another), antibodies
Because they are based on samples and outcomes vary between different samples.
All that the samples do is enable the observer to make measurements of some characteristic.
There are 25C7 different samples of seven from a pool of 25.25C7 = 25!/(7!(25-7)!) = 480 700 different samples of 7
gas liquid chromatography-mass spectrometry technique
A group of people is presenting with a delayed onset of blisters and a dry productive cough that later turns productive. What is the likely culprit?
A group of people is presenting with a delayed onset of blisters and a dry productive cough that later turns productive. What is the likely culprit?
Assaying the samples in triplicate is another control. If you do not get the same result in all triplicate wells, you have a problem with your experimental technique or you have made a pipetting error. In a clinical laboratory, the experiment would have to be repeated.
From clinical samples (skin)
No. An extensive review of the scientific literature has revealed only one report of mycotoxins associated with two samples yeast products. This association was found in a product used in an animal feed manufacturing facility and could easily have been cross contaminated with another feed ingredient.
Clinical centrifuge are devices used for clinical applications like blood collection tubes. These laboratory equipment are driven by motor and spins liquid samples at high speed.
The law that allows Environmental Health officers to take samples for testing is called the Public and Environment Health Act of 1987.
A questionnaire has little to do with sampling technique. Sampling technique is to do with who gets the questionnaire and that can be any sampling technique: the questionnaire can be sent to everyone (census), to a random sample, stratified random samples, to random samples in clusters, by quota or convenience. Or a pile of questionnaires can be left for respondents to pick up - self-selection.
Tissue samples taken by biopsy are sent to a clinical laboratory, where they are analyzed by a pathologist.
Tissue samples taken by biopsy are sent to a clinical laboratory, where they are analyzed by a pathologist.
The tissue samples are not alive. They are not growing/moving like a living human so the effects the drugs have on the non living samples may be different to the effects on a living human.